Dear Jack,
We’ve believed in your vision of Twitter for years. Laura joined Twitter as an employee in 2009, and Ellen tried to invest in the company almost a decade ago. The idea of a platform for new ideas, open conversations, and positive interactions on a global scale was powerful and compelling — so strong that today the president of the United States and 300 million others participate and engage with the service each month. That’s a remarkable accomplishment.

But @realdonaldtrump is bringing out the worst of Twitter — the company, the platform, and its users. He’s using his manipulation skills and your platform to bully others, and to incite supporters to harass people — both on Twitter and in real life.

For example, Trump used Twitter to criticize civil rights hero, Representative John Lewis, who spoke at the March on Washington alongside Martin Luther King Jr. He tweeted an attack on award-winning actor Meryl Streep for speaking out against his regressive social policies. He blamed a local union leader, Chuck Jones, for the loss of American jobs. [ Ellen K. Pao ]